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ABHI Examination Matrices  

To begin your preparation in an informed and organized manner, you should know what to expect from the actual examination in terms of the content tested. The test matrices describe the content categories covered on the examination. The matrices can be used to get a general impression of the examination and, with closer inspection, can give you specific study direction. For example, by comparing the number of items in each category, you can determine the relative importance given to each category on the examination.

 
Content Area Number of Items 

**CHA Exam
CHT Exam

Number of Items 



CHS Exam

1. General Laboratory Skills and Specimen Requirements 
  1. Specimen Requirements
  2. Laboratory Safety
  3. Laboratory Maintenance

10 9
2. Reagent Preparation 
  1. Prepare Solutions, Stains, and Gradients
  2. Prepare Serological Reagents
  3. Prepare Reagents for Molecular Assays

15 16
3. Methodology 
  1. Cell and Serum Preparation
  2. Serological Assays
  3. Molecular Biology Assays

40 29
4. Test Results Interpretation 
  1. Serological Results
  2. Molecular Biology Assays
  3. Results Reporting

40 37
5. General Histocompatibility Testing Principles and Theory 
  1. Major Histocompatibility Complex (MHC) Immunogenetics
  2. Molecular Genetics
  3. Basic Immunology and Serology

30 25
6. Quality Assurance 
  1. Reagents
  2. Instrumentation/Equipment
  3. Documentation
  4. Compliance

15 19
7. Supervisory Functions/Management (CHS only)
  1. Staffing
  2. Cost Management
  3. Laboratory Operations

N/A 15

TOTAL

150 150

More detailed content outlines based on the job analysis outlining the specific tasks in Candidate Handbook (101KB, PDF)